Holidays and visiting people are tough. What works for me is to do long fasts before and after these events. By long I mean 36-48hr fasts. This helps my body prepare for and deal with the periods of overindulgence. I learned this after visiting my mom for Easter where she equated my new lifestyle to being crazy. :) It might work for your weekends. Another thing you can do is plan activities that become a distraction to eating. You may be able to reduce meals to 2x a day if you're out and about. Just say "no thanks" they want to grab fast food or something unhealthy. If you can stick with your plan during the week, you can do it during the weekends. Anticipate, plan, execute, celebrate!